/////////////////////////////////////////////////////////////
//
// pgAdmin 4 - PostgreSQL Tools
//
// Copyright (C) 2013 - 2022, The pgAdmin Development Team
// This software is released under the PostgreSQL Licence
//
//////////////////////////////////////////////////////////////

import React, { useEffect, useMemo } from 'react';
import PgTable from 'sources/components/PgTable';
import gettext from 'sources/gettext';
import PropTypes from 'prop-types';
import { makeStyles } from '@material-ui/core/styles';
import pgAdmin from 'sources/pgadmin';
import { BgProcessManagerEvents, BgProcessManagerProcessState } from './BgProcessManager';
import { PgIconButton } from '../../../../static/js/components/Buttons';
import CancelIcon from '@material-ui/icons/Cancel';
import DescriptionOutlinedIcon from '@material-ui/icons/DescriptionOutlined';
import DeleteIcon from '@material-ui/icons/Delete';
import HelpIcon from '@material-ui/icons/HelpRounded';
import url_for from 'sources/url_for';
import { Box } from '@material-ui/core';
import Notifier from '../../../../static/js/helpers/Notifier';


const useStyles = makeStyles((theme) => ({
  stopButton: {
    color: theme.palette.error.main
  },
  buttonClick: {
    backgroundColor: theme.palette.grey[400]
  },
  emptyPanel: {
    minHeight: '100%',
    minWidth: '100%',
    background: theme.otherVars.emptySpaceBg,
    overflow: 'auto',
    padding: '8px',
    display: 'flex',
  },
  panelIcon: {
    width: '80%',
    margin: '0 auto',
    marginTop: '25px !important',
    position: 'relative',
    textAlign: 'center',
  },
  panelMessage: {
    marginLeft: '0.5rem',
    fontSize: '0.875rem',
  },
  autoResizer: {
    height: '100% !important',
    width: '100% !important',
    background: theme.palette.grey[400],
    padding: '7.5px',
    overflow: 'auto !important',
    minHeight: '100%',
    minWidth: '100%',
  },
  noPadding: {
    padding: 0,
  },
  bgSucess: {
    backgroundColor: theme.palette.success.light,
    height: '100%',
    padding: '4px',
  },
  bgFailed: {
    backgroundColor: theme.palette.error.light,
    height: '100%',
    padding: '4px',
  },
  bgTerm: {
    backgroundColor: theme.palette.warning.light,
    height: '100%',
    padding: '4px',
  },
  bgRunning: {
    backgroundColor: theme.palette.primary.light,
    height: '100%',
    padding: '4px',
  },
}));


const ProcessStateTextAndColor = {
  [BgProcessManagerProcessState.PROCESS_NOT_STARTED]: [gettext('Not started'), 'bgRunning'],
  [BgProcessManagerProcessState.PROCESS_STARTED]: [gettext('Running'), 'bgRunning'],
  [BgProcessManagerProcessState.PROCESS_FINISHED]: [gettext('Finished'), 'bgSucess'],
  [BgProcessManagerProcessState.PROCESS_TERMINATED]: [gettext('Terminated'), 'bgTerm'],
  [BgProcessManagerProcessState.PROCESS_TERMINATING]: [gettext('Terminating...'), 'bgTerm'],
  [BgProcessManagerProcessState.PROCESS_FAILED]: [gettext('Failed'), 'bgFailed'],
};

export default function Processes() {
  const classes = useStyles();
  const [tableData, setTableData] = React.useState([]);
  const [selectedRows, setSelectedRows] = React.useState([]);

  let columns = useMemo(()=>[
    {
      accessor: 'stop_process',
      Header: () => null,
      sortable: false,
      resizable: false,
      disableGlobalFilter: true,
      width: 35,
      maxWidth: 35,
      minWidth: 35,
      id: 'btn-stop',
      // eslint-disable-next-line react/display-name
      Cell: ({ row }) => {
        return (
          <PgIconButton
            size="xs"
            noBorder
            icon={<CancelIcon />}
            className={classes.stopButton}
            disabled={row.original.process_state != BgProcessManagerProcessState.PROCESS_STARTED
              || row.original.server_id != null}
            onClick={(e) => {
              e.preventDefault();
              pgAdmin.Browser.BgProcessManager.stopProcess(row.original.id);
            }}
            aria-label="Stop Process"
            title={gettext('Stop Process')}
          ></PgIconButton>
        );
      },
    },
    {
      accessor: 'view_details',
      Header: () => null,
      sortable: false,
      resizable: false,
      disableGlobalFilter: true,
      width: 35,
      maxWidth: 35,
      minWidth: 35,
      id: 'btn-logs',
      // eslint-disable-next-line react/display-name
      Cell: ({ row }) => {
        return (
          <PgIconButton
            size="xs"
            icon={<DescriptionOutlinedIcon />}
            noBorder
            onClick={(e) => {
              e.preventDefault();
              pgAdmin.Browser.BgProcessManager.viewJobDetails(row.original.id);
            }}
            aria-label="View details"
            title={gettext('View details')}
          />
        );
      },
    },
    {
      Header: gettext('PID'),
      accessor: 'utility_pid',
      sortable: true,
      resizable: false,
      width: 70,
      minWidth: 70,
      disableGlobalFilter: false,
    },
    {
      Header: gettext('Type'),
      accessor: (row)=>row.details?.type,
      sortable: true,
      resizable: true,
      width: 100,
      minWidth: 70,
      disableGlobalFilter: false,
    },
    {
      Header: gettext('Server'),
      accessor: (row)=>row.details?.server,
      sortable: true,
      resizable: true,
      width: 200,
      minWidth: 120,
      disableGlobalFilter: false,
    },
    {
      Header: gettext('Object'),
      accessor: (row)=>row.details?.object,
      sortable: true,
      resizable: true,
      width: 200,
      minWidth: 120,
      disableGlobalFilter: false,
    },
    {
      id: 'stime',
      Header: gettext('Start Time'),
      sortable: true,
      resizable: true,
      disableGlobalFilter: true,
      width: 150,
      minWidth: 150,
      accessor: (row)=>(new Date(row.stime)),
      Cell: ({row})=>(new Date(row.original.stime).toLocaleString()),
    },
    {
      Header: gettext('Status'),
      sortable: true,
      resizable: false,
      disableGlobalFilter: false,
      width: 120,
      minWidth: 120,
      accessor: (row)=>ProcessStateTextAndColor[row.process_state][0],
      dataClassName: classes.noPadding,
      Cell: ({row})=>{
        const [text, bgcolor] = ProcessStateTextAndColor[row.original.process_state];
        return <Box className={classes[bgcolor]}>{text}</Box>;
      },
    },
    {
      Header: gettext('Time Taken (sec)'),
      accessor: 'execution_time',
      sortable: true,
      resizable: true,
      disableGlobalFilter: true,
    },
  ], []);

  const updateList = ()=>{
    if(pgAdmin.Browser.BgProcessManager.procList) {
      setTableData([...pgAdmin.Browser.BgProcessManager.procList]);
    }
  };

  useEffect(() => {
    updateList();
    pgAdmin.Browser.BgProcessManager.registerListener(BgProcessManagerEvents.LIST_UPDATED, updateList);
    return ()=>{
      pgAdmin.Browser.BgProcessManager.deregisterListener(BgProcessManagerEvents.LIST_UPDATED, updateList);
    };
  }, []);

  return (
    <>
      <PgTable
        data-test="processes"
        className={classes.autoResizer}
        columns={columns}
        data={tableData}
        sortOptions={[{id: 'stime', desc: true}]}
        getSelectedRows={(rows)=>{setSelectedRows(rows);}}
        isSelectRow={true}
        tableProps={{
          autoResetSelectedRows: false,
          getRowId: (row)=>{
            return row.id;
          }
        }}
        CustomHeader={()=>{
          return (
            <Box>
              <PgIconButton
                className={classes.dropButton}
                icon={<DeleteIcon/>}
                aria-label="Acknowledge and Remove"
                title={gettext('Acknowledge and Remove')}
                onClick={() => {
                  Notifier.confirm(gettext('Remove Processes'), gettext('Are you sure you want to remove the selected processes?'), ()=>{
                    pgAdmin.Browser.BgProcessManager.acknowledge(selectedRows.map((p)=>p.original.id));
                  });
                }}
                disabled={selectedRows.length <= 0}
              ></PgIconButton>
              <PgIconButton
                icon={<HelpIcon/>}
                aria-label="Help"
                title={gettext('Help')}
                style={{marginLeft: '8px'}}
                onClick={() => {
                  window.open(url_for('help.static', {'filename': 'processes.html'}));
                }}
              ></PgIconButton>
            </Box>
          );
        }}
      ></PgTable>
    </>
  );
}

Processes.propTypes = {
  res: PropTypes.array,
  nodeData: PropTypes.object,
  treeNodeInfo: PropTypes.object,
  node: PropTypes.func,
  item: PropTypes.object,
  row: PropTypes.object,
};